I have been to Bangkok a few times, and this apartment is hands down in the best location! Very centrally located, MANY wonderful street food and restaurants right outside the building (the Bang Rak area is known for their amazing food!), and the BTS Saphan Taksin station/Sathorn Pier is about a 5 minute walk away.
The apartment itself is fantastic. It's sparkling clean, located on a higher floor with a killer view of the city, and Bird is a phenomenal host! Check- in was a breeze - I ended up getting stuck in traffic on my way there, making me over an hour late, and she was easily able to accommodate. She provided detailed directions and pictures of different sights to see and even provided the names in Thai for the tuk-tuk drivers to be able to understand. Very helpful information that came in handy multiple times!
I can't recommend this apartment enough! I will definitely be back and hope to stay here again - if it's available! : )